EP1596390A3 - Data recording system - Google Patents

Data recording system Download PDF

Info

Publication number
EP1596390A3
EP1596390A3 EP05103595A EP05103595A EP1596390A3 EP 1596390 A3 EP1596390 A3 EP 1596390A3 EP 05103595 A EP05103595 A EP 05103595A EP 05103595 A EP05103595 A EP 05103595A EP 1596390 A3 EP1596390 A3 EP 1596390A3
Authority
EP
European Patent Office
Prior art keywords
prbs
track
region
head
dipulses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05103595A
Other languages
German (de)
French (fr)
Other versions
EP1596390B1 (en
EP1596390A2 (en
Inventor
Zvonimir Z. Bandic
Richard M.H. New
Bruce Alexander Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HGST Netherlands BV
Original Assignee
Hitachi Global Storage Technologies Netherlands BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Global Storage Technologies Netherlands BV filed Critical Hitachi Global Storage Technologies Netherlands BV
Publication of EP1596390A2 publication Critical patent/EP1596390A2/en
Publication of EP1596390A3 publication Critical patent/EP1596390A3/en
Application granted granted Critical
Publication of EP1596390B1 publication Critical patent/EP1596390B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59688—Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
    • G11B2020/1232—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc sector, i.e. the minimal addressable physical data unit
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
    • G11B2020/1238—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1287—Synchronisation pattern, e.g. VCO fields
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks

Abstract

A data recording system, such as a magnetic recording hard disk drive, has a recording medium in which the data tracks have pseudo-random binary sequences for the servo information used to control the position of the recording head. A first pseudo-random binary sequence (PRBS) and a second PRBS identical to the first PRBS but shifted by a portion of the period of the first PRBS are located between the track boundaries in alternating tracks in a first region of the servo pattern and between the track centers in alternating tracks in a second region spaced along the track from said first region. A servo decoder has two correlators, one for each PRBS. Each correlator outputs a dipulse when its PRBS repeats. The difference in amplitude of the dipulses represents the head position signal. The dipulses also control the amplifier for the signal read back by the head and the timing of the track identification (TID) detector.
EP05103595A 2004-05-13 2005-04-29 Data recording system Expired - Fee Related EP1596390B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US845814 2004-05-13
US10/845,814 US6967808B1 (en) 2004-05-13 2004-05-13 Data recording system with servo pattern having pseudo-random binary sequences

Publications (3)

Publication Number Publication Date
EP1596390A2 EP1596390A2 (en) 2005-11-16
EP1596390A3 true EP1596390A3 (en) 2005-12-28
EP1596390B1 EP1596390B1 (en) 2007-06-13

Family

ID=34939618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05103595A Expired - Fee Related EP1596390B1 (en) 2004-05-13 2005-04-29 Data recording system

Country Status (5)

Country Link
US (1) US6967808B1 (en)
EP (1) EP1596390B1 (en)
JP (1) JP2005327448A (en)
CN (1) CN1707621A (en)
DE (1) DE602005001354T2 (en)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7262318B2 (en) * 2004-03-10 2007-08-28 Pfizer, Inc. Substituted heteroaryl- and phenylsulfamoyl compounds
US7193800B2 (en) * 2004-05-06 2007-03-20 Hitachi Global Storage Technologies Netherlands B.V. Data recording medium with servo pattern having pseudo-noise sequences
US20050288340A1 (en) * 2004-06-29 2005-12-29 Pfizer Inc Substituted heteroaryl- and phenylsulfamoyl compounds
US7206146B2 (en) * 2004-10-27 2007-04-17 Hitachi Global Storage Technologies Netherlands B.V. Biphase magnetic pattern detector using multiple matched filters for hard disk drive
CN100429697C (en) * 2005-02-16 2008-10-29 Tdk股份有限公司 Magnetic recording medium, recording/reproducing apparatus, and stamper
CN1828730B (en) * 2005-02-28 2010-10-13 Tdk股份有限公司 Magnetic recording medium, recording/reproducing apparatus, and stamper
US7721049B2 (en) 2006-03-27 2010-05-18 Kabuhsiki Kaisha Toshiba Disk drive write method
US7436616B2 (en) 2006-05-31 2008-10-14 Toshiba Corporation Current pulsing for unloading
US7453660B2 (en) * 2006-05-31 2008-11-18 Kabushiki Kaisha Toshiba Shock feed forward adaptive filters
US20070279790A1 (en) * 2006-05-31 2007-12-06 Tanner Brian K Adjustable output voltage regulator for disk drive
US7457066B2 (en) * 2006-05-31 2008-11-25 Kabushiki Kiasha Toshiba Method and apparatus for phase-shift null-burst-pattern
US20070279788A1 (en) * 2006-05-31 2007-12-06 Toshiba America Information Systems, Inc. Method and apparatus to perform defect scanning
US20070279781A1 (en) * 2006-05-31 2007-12-06 Toshiba America Information Systems, Inc. Channel training method and apparatus
US7468859B2 (en) * 2006-05-31 2008-12-23 Kabushiki Kaisha Toshiba Voice coil motor effective resistance determination
KR100884003B1 (en) * 2007-01-26 2009-02-17 삼성전자주식회사 Method for preventing write fault and Hard Disk Drive thereof
US7502197B1 (en) 2007-02-06 2009-03-10 Western Digital Technologies, Inc. Disk drive demodulating a time-based servo pattern
KR20090001369A (en) * 2007-06-29 2009-01-08 삼성전자주식회사 Magnetic recording media and method for fabricating the same
US7746594B1 (en) 2008-09-29 2010-06-29 Western Digital Technologies, Inc. Disk drive comprising slanted line servo burst sets offset radially
US7916416B1 (en) 2008-09-29 2011-03-29 Western Digital Technologies, Inc. Disk drive comprising slanted line servo bursts having a varying tilt angle
US7746595B1 (en) 2008-09-29 2010-06-29 Western Digital Technologies, Inc. Disk drive comprising slanted line servo bursts having reverse polarity segments
WO2010126494A1 (en) * 2009-04-29 2010-11-04 Hewlett-Packard Development Company, L.P. Arrangement and processing of longitudinal position information on a data storage medium
US9384779B2 (en) * 2009-12-18 2016-07-05 HGST Netherlands B.V. Information storage device with multiple-use fields in servo pattern
US9311942B2 (en) * 2009-12-18 2016-04-12 HGST Netherlands B.V. Information storage device with multiple-use fields in servo pattern
US8422161B2 (en) * 2009-12-18 2013-04-16 HGST Netherlands B.V. Information storage device with multiple-use fields in servo pattern
US8477442B2 (en) 2010-05-11 2013-07-02 HGST Netherlands B.V. Patterned media for self-servowriting integrated servo fields
US8625231B1 (en) * 2012-11-08 2014-01-07 HGST Netherlands B.V. Adjusting VGA analog gain for misaligned servo sectors in a disk drive
US8760794B1 (en) 2013-05-16 2014-06-24 HGST Netherlands B.V. Servo systems with augmented servo bursts
US8767341B1 (en) 2013-05-16 2014-07-01 HGST Netherlands B.V. Servo systems with augmented servo bursts
US8988807B1 (en) * 2013-09-19 2015-03-24 HGST Netherlands B.V. Disk drive with different data sector integrated preambles in adjacent data tracks
US8982491B1 (en) 2013-09-19 2015-03-17 HGST Netherlands B.V. Disk drive with different synchronization fields and synchronization marks in the data sector preambles in adjacent data tracks
US9099158B1 (en) * 2013-10-08 2015-08-04 Seagate Technology Llc Multi-track signal dipulse extraction
US8861122B1 (en) * 2013-12-14 2014-10-14 Lsi Corporation Systems and methods for sync mark based read offset detection
US8861118B1 (en) 2013-12-19 2014-10-14 HGST Netherlands B.V. Disk drive with servo system providing time-syncing for gapless sectors
US9053728B1 (en) 2014-11-21 2015-06-09 HGST Netherlands B.V. Servo systems with PES enhanced integrated servo bursts
US10553247B2 (en) * 2018-05-30 2020-02-04 Western Digital Technologies, Inc. Data storage device calibrating data density based on amplitude-inverted or time-inverted read signal
JP2021018827A (en) 2019-07-23 2021-02-15 株式会社東芝 Disk device

Citations (6)

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US4823212A (en) * 1986-11-26 1989-04-18 Hewlett-Packard Company Sampled servo code format and system for a disc drive
US5253131A (en) * 1990-03-06 1993-10-12 Maxtor Corporation Servo pattern for location and positioning of information on a disk drive
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US6208477B1 (en) * 1997-06-06 2001-03-27 Western Digital Corporation Hard disk drive having a built-in self-test for measuring non-linear signal distortion
US20020154430A1 (en) * 2000-04-05 2002-10-24 Rae James W. Read/write channel
JP2004055079A (en) * 2002-07-23 2004-02-19 Pioneer Electronic Corp Recording medium distinguishing device and method therefor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823212A (en) * 1986-11-26 1989-04-18 Hewlett-Packard Company Sampled servo code format and system for a disc drive
US5253131A (en) * 1990-03-06 1993-10-12 Maxtor Corporation Servo pattern for location and positioning of information on a disk drive
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US6208477B1 (en) * 1997-06-06 2001-03-27 Western Digital Corporation Hard disk drive having a built-in self-test for measuring non-linear signal distortion
US20020154430A1 (en) * 2000-04-05 2002-10-24 Rae James W. Read/write channel
JP2004055079A (en) * 2002-07-23 2004-02-19 Pioneer Electronic Corp Recording medium distinguishing device and method therefor
US20040130991A1 (en) * 2002-07-23 2004-07-08 Yuji Tawaragi Recording medium type determining apparatus and recording medium type determining method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Also Published As

Publication number Publication date
JP2005327448A (en) 2005-11-24
CN1707621A (en) 2005-12-14
US20050254160A1 (en) 2005-11-17
DE602005001354D1 (en) 2007-07-26
DE602005001354T2 (en) 2008-02-07
EP1596390B1 (en) 2007-06-13
EP1596390A2 (en) 2005-11-16
US6967808B1 (en) 2005-11-22

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